[Loadstone] Saving accurate point coordinates.

Len Burns len at gatamundo.com
Thu Jul 19 06:50:03 BST 2007


Interesting, which receiver are you currently using?

-L
On Wed, 18 Jul 2007, Kevin Chao wrote:

> The ability to receive the waas signal greatly depends on the particular
> receiver that one is using. Although there is a small portion that depends
> on the area, but I have received waas with a very high frequency with the
> reciever I am currently using, about 90% of the time. This is in contrast to
> the receivers I used in the past, with them receiving waas about 50% and the
> other 10% of the time respectively. As newer and more improved chipsets are
> produced, the frequency of the ability to receive the waas signal will also
> increase.
>
> Kevin
>
> ----- Original Message -----
> From: "Len Burns" <len at gatamundo.com>
> To: <loadstone at loadstone-gps.com>
> Sent: Wednesday, July 18, 2007 10:10 PM
> Subject: Re: [Loadstone] Saving accurate point coordinates.
>
>
>> Nor have I in South San Francisco Bay area, California, Los Angeles,
>> Chicago nor New York City.
>>
>> -Len
>> On Thu, 19 Jul 2007, Jim Ruby wrote:
>>
>>> I have never seen waas enabled and I have traveled in Minnesota, south
>>> Dakota, Wisconsin, ilinois, Indiana and ohio. And I do have it set to on
>>> in
>>> the settings.
>>>
>>> I wonder where this is mainly used.
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: loadstone-bounces at loadstone-gps.com
>>> [mailto:loadstone-bounces at loadstone-gps.com] On Behalf Of Shawn
>>> Kirkpatrick
>>> Sent: Wednesday, July 18, 2007 11:23 PM
>>> To: loadstone at loadstone-gps.com
>>> Subject: Re: [Loadstone] Saving accurate point coordinates.
>>>
>>> You may have waas enabled but might not be getting it anyway. On my
>>> royaltek
>>>
>>> I've never seen it get a waas signal. You can check this by checking the
>>> gps
>>>
>>> quality, if it says differencial fix then you have waas, if not then you
>>> have standard gps. The accuracy for standard gps is around 15 meters. If
>>> your points are within that then things are ok. You can make manual
>>> adjustments to the coordinates with the point update window. The problem
>>> there is you wouldn't know what the "accurate" value should be. Every
>>> time
>>> you were on the point the gps receiver could give different coordinates.
>>> So
>>> a correction that seemed to work one day could be completely inaccurate
>>> the
>>> next. No matter how accurate the point coordinates are you still have the
>>> gps drift to deal with. In the worst case those two inaccuracies add
>>> together to create a bad result but in practice this doesn't seem to
>>> happen
>>> too often.
>>> I guess the real solution to this is to wait for better quality consumer
>>> receivers to come out or get your hands on some military-grade hardware.
>>>
>>> On Wed, 18 Jul 2007, Dave Mielke wrote:
>>>
>>>> [quoted lines by Shawn Kirkpatrick on 2007/07/18 at 17:30 -0700]
>>>>
>>>>> What you're experiencing is gps drift and it's to be expected.
>>>>
>>>> Yes, I understand this.
>>>>
>>>>> If your is waas capable this drift can go down quite a bit when
>>>>> standing
>>> still
>>>>> but will still be there.
>>>>
>>>> It is, and I always leave it on.
>>>>
>>>>> We've considered putting in some sort of averaging
>>>>> but you'd have to be standing still for some period of time for it to
>>> work.
>>>>
>>>> Wel;l, in this case I was sitting, but I understand what you're saying.
>>>>
>>>>> Even then it would only be an average so still not quite accurate.
>>>>
>>>> However inaccurate it may remain, it'd surely be better than an
>>> instantaneous
>>>> single capture which just might be way off.
>>>>
>>>> Another approach mightr be for the user to be able to move a point by an
>>> amount
>>>> in a direction. That way, he could make an imperical judgement based on
>>> several
>>>> measurements and then make manual adjustments.
>>>>
>>>> --
>>>> Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is
>>> the
>>>> Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact
>>>> me
>>>> EMail: dave at mielke.cc | Canada  K2A 1H7   | if you're concerned about
>>> Hell.
>>>> http://FamilyRadio.com/                   | http://Mielke.cc/bible/
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>>
>> --
>>
>> "Do not go where the path may lead, go instead where there is no path
>> and leave a trail."
>> ~ Ralph Waldo Emerson ~
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>
>
>
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--

"Do not go where the path may lead, go instead where there is no path
and leave a trail."
~ Ralph Waldo Emerson ~


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